CN110957736A - Reactive power compensation device based on novel compound fling-cut switch - Google Patents
Reactive power compensation device based on novel compound fling-cut switch Download PDFInfo
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- CN110957736A CN110957736A CN201911059331.1A CN201911059331A CN110957736A CN 110957736 A CN110957736 A CN 110957736A CN 201911059331 A CN201911059331 A CN 201911059331A CN 110957736 A CN110957736 A CN 110957736A
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- reactive power
- compensation device
- switching switch
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The invention particularly relates to a reactive power compensation device based on a novel composite fling-cut switch, which comprises a voltage signal acquisition unit, a current signal acquisition unit, a compensation current acquisition unit, a first A/D conversion unit, a second A/D conversion unit, a control processing unit, a key input unit, a storage unit, a display unit, a communication unit, a trigger unit, a composite fling-cut switch and a capacitor bank, wherein the voltage signal acquisition unit is connected with the first A/D conversion unit; and the reactive power compensation device calculates a power factor and reactive power according to the acquired signals, compares the power factor and the reactive power with preset parameters, and controls the working condition of the capacitor bank through the composite fling-cut switch to complete reactive power compensation. The invention provides a novel composite switching switch-based reactive power compensation device, wherein in the switching process, a thyristor is conducted to work, and a magnetic latching relay maintains the on-off state after switching is finished, so that a capacitor can be disconnected from a power grid when the current is zero to realize the arc extinguishing function.
Description
Technical Field
The invention belongs to the technical field of electric power, and particularly relates to a reactive power compensation device based on a novel composite fling-cut switch.
Background
In a power distribution system, a capacitor bank is a reactive compensation device with wide application, and the safe and reliable operation of the capacitor bank plays an important role in the normal power supply of the power distribution system.
The traditional reactive power compensation device usually adopts an alternating current contactor as a switching switch, inrush current can be generated when a capacitor is put into use, and contacts are easy to bond and are not easy to pull open. Then, a thyristor switch appears, which can limit the switching-on inrush current, but the phenomena of conduction voltage drop and heating can occur during conduction. In order to solve the problems, a compound switch is also provided, which is formed by connecting a thyristor and an alternating current contactor in parallel and has the advantages of two switches, but when the alternating current contactor normally operates, a coil of the alternating current contactor needs to be electrified all the time, and the line loss is large. The invention provides a reactive power compensation device based on a novel composite fling-cut switch, wherein the novel composite fling-cut switch is used as a fling-cut switch, a magnetic latching relay is used for replacing an alternating current contactor and is connected with a thyristor in parallel, the thyristor is conducted to work in the fling-cut process of the novel composite fling-cut switch, and the magnetic latching relay maintains the on-off state after the fling-cut process is finished, so that the capacitor can be disconnected from a power grid when the current is zero, and the arc extinguishing function is.
Disclosure of Invention
The invention provides a novel composite switching switch-based reactive power compensation device, wherein in the switching process, a thyristor is conducted to work, and a magnetic latching relay maintains the on-off state after switching is finished, so that a capacitor can be disconnected from a power grid when the current is zero to realize the arc extinguishing function.
The invention particularly relates to a reactive power compensation device based on a novel composite fling-cut switch, which comprises a voltage signal acquisition unit, a current signal acquisition unit, a compensation current acquisition unit, a first A/D conversion unit, a second A/D conversion unit, a control processing unit, a key input unit, a storage unit, a display unit, a communication unit, a trigger unit, a composite fling-cut switch and a capacitor bank, wherein the voltage signal acquisition unit and the current signal acquisition unit are respectively connected with the first A/D conversion unit, the compensation current acquisition unit is connected with the second A/D conversion unit, and the control processing unit is respectively connected with the first A/D conversion unit, the second A/D conversion unit, the key input unit, the storage unit, the control processing unit, The display unit, the communication unit and the trigger unit are connected, and the trigger unit is also sequentially connected with the composite switching switch, the capacitor bank and the compensation current acquisition unit; and the reactive power compensation device calculates a power factor and reactive power according to the acquired signals, compares the power factor and the reactive power with preset parameters, and controls the working condition of the capacitor bank through the composite fling-cut switch to complete reactive power compensation.
The voltage signal acquisition unit acquires a voltage signal by adopting a voltage sensor; the current signal acquisition unit acquires a current signal of a compensation point by adopting a current sensor; the compensation current acquisition unit acquires a compensation current value output by the capacitor bank by adopting a current sensor.
The key input unit is combined with the storage unit and the display unit to carry out parameter setting and information query on the reactive power compensation device, and the parameters comprise a power factor reference value and a reactive power reference value.
The communication unit uploads the information of the reactive compensation device to an upper computer by adopting a GPRS wireless communication technology, and can receive an instruction signal of the upper computer.
The composite fling-cut switch comprises a thyristor, a magnetic latching relay, an RC absorption circuit and a light isolation circuit, and the working state of the composite fling-cut switch is controlled according to the trigger signal of the trigger unit: when the compound switching switch is put into use, the thyristor is put into use firstly, then the magnetic latching relay is put into use, and then the thyristor is turned off; when the compound switching switch is switched off, the thyristor is switched on in a pilot mode, the magnetic latching relay is switched off, and the thyristor is switched off;
the control processing unit adopts a microprocessor to perform information processing and control on the reactive power compensation device:
calculating the reactive power and the power factor according to the voltage signal and the compensation point current signal, comparing the power factor with the power factor reference value, and controlling the trigger unit to be put into the compound switching switch if the power factor is larger than the power factor reference value; and if the reactive power is not greater than the reference value of the power factor, comparing the reactive power with the reference value of the reactive power, and if the reactive power is less than the reference value of the reactive power, controlling the triggering unit to be put into the compound switching switch.
Compared with the prior art, the beneficial effects are: the reactive power compensation device adopts the composite switching switch to switch the capacitor bank, the thyristor is conducted to work in the switching process of the composite switching switch, and the on-off state is maintained by the magnetic latching relay after the switching is finished, so that the capacitor bank can be ensured to be disconnected from a power grid when the current is zero to realize the arc extinguishing function, and the service life of the composite switching switch is prolonged; by adopting the double judgment of the reactive power and the power factor, the defect that the reactive power is still large when the power factor condition is met can be overcome, and switching oscillation is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a reactive power compensation device based on a novel compound fling-cut switch.
Detailed Description
The following describes in detail a specific embodiment of the reactive power compensation device based on the novel compound fling-cut switch according to the present invention with reference to the accompanying drawings.
As shown in fig. 1, the reactive power compensation device of the present invention includes a voltage signal collection unit, a current signal collection unit, a compensation current collection unit, a first a/D conversion unit, a second a/D conversion unit, a control processing unit, a key input unit, a storage unit, a display unit, a communication unit, a trigger unit, a compound switching switch, and a capacitor bank, wherein the voltage signal collection unit and the current signal collection unit are respectively connected to the first a/D conversion unit, the compensation current collection unit is connected to the second a/D conversion unit, the control processing unit is respectively connected to the first a/D conversion unit, the second a/D conversion unit, the key input unit, the storage unit, the display unit, the communication unit, and the trigger unit, the trigger unit is also sequentially connected with the composite fling-cut switch, the capacitor bank and the compensation current acquisition unit; and the reactive power compensation device calculates a power factor and reactive power according to the acquired signals, compares the power factor and the reactive power with preset parameters, and controls the working condition of the capacitor bank through the composite fling-cut switch to complete reactive power compensation.
The voltage signal acquisition unit acquires a voltage signal by adopting a voltage sensor; the current signal acquisition unit acquires a current signal of a compensation point by adopting a current sensor; the compensation current acquisition unit acquires a compensation current value output by the capacitor bank by adopting a current sensor.
The key input unit is combined with the storage unit and the display unit to carry out parameter setting and information query on the reactive power compensation device, and the parameters comprise a power factor reference value and a reactive power reference value.
The communication unit uploads the information of the reactive compensation device to an upper computer by adopting a GPRS wireless communication technology, and can receive an instruction signal of the upper computer.
The composite fling-cut switch comprises a thyristor, a magnetic latching relay, an RC absorption circuit and a light isolation circuit, and the working state of the composite fling-cut switch is controlled according to the trigger signal of the trigger unit: when the compound switching switch is put into use, the thyristor is put into use firstly, then the magnetic latching relay is put into use, and then the thyristor is turned off; when the compound switching switch is switched off, the thyristor is switched on in a pilot mode, the magnetic latching relay is switched off, and the thyristor is switched off;
in the switching process of the composite switching switch, the thyristor is conducted to work, and the on-off state is maintained by the magnetic latching relay after switching is completed, so that the capacitor bank can be ensured to be disconnected from a power grid to realize an arc extinguishing function when the current is zero, and the service life of the composite switching switch is prolonged.
The control processing unit adopts a microprocessor to perform information processing and control on the reactive power compensation device:
calculating the reactive power and the power factor according to the voltage signal and the compensation point current signal, comparing the power factor with the power factor reference value, and controlling the trigger unit to be put into the compound switching switch if the power factor is larger than the power factor reference value; if the reactive power is not greater than the power factor reference value, the reactive power is compared with the reactive power reference value, and if the reactive power is greater than the reactive power reference value, the triggering unit is controlled to be switched into the composite switching switch, so that the defect that the power factor condition is met but the reactive power is still large can be overcome, and switching oscillation is avoided.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides a reactive power compensator based on novel compound on-off switch, its characterized in that, reactive power compensator includes voltage signal acquisition unit, current signal acquisition unit, compensation current acquisition unit, first AD converting unit, second AD converting unit, control processing unit, button input unit, memory cell, display element, communication unit, trigger unit, compound on-off switch, capacitor bank, voltage signal acquisition unit, current signal acquisition unit respectively with first AD converting unit is connected, compensation current acquisition unit with second AD converting unit is connected, control processing unit respectively with first AD converting unit, second AD converting unit, button input unit, memory cell, storage cell, The display unit, the communication unit and the trigger unit are connected, and the trigger unit is also sequentially connected with the composite switching switch, the capacitor bank and the compensation current acquisition unit; and the reactive power compensation device calculates a power factor and reactive power according to the acquired signals, compares the power factor and the reactive power with preset parameters, and controls the working condition of the capacitor bank through the composite fling-cut switch to complete reactive power compensation.
2. The reactive power compensation device based on the novel compound switching switch is characterized in that the voltage signal acquisition unit adopts a voltage sensor to acquire a voltage signal; the current signal acquisition unit acquires a current signal of a compensation point by adopting a current sensor; the compensation current acquisition unit acquires a compensation current value output by the capacitor bank by adopting a current sensor.
3. The reactive power compensation device based on the novel compound switching switch according to claim 2, wherein the key input unit is combined with the storage unit and the display unit to perform the parameter setting and information query on the reactive power compensation device, and the parameters include a power factor reference value and a reactive power reference value.
4. The reactive power compensation device based on the novel compound fling-cut switch is characterized in that the communication unit uploads the information of the reactive power compensation device to an upper computer by adopting a GPRS wireless communication technology and can receive an instruction signal of the upper computer.
5. The reactive power compensation device based on the novel compound switching switch according to claim 4, wherein the compound switching switch comprises a thyristor, a magnetic latching relay, an RC absorption circuit and a light isolation circuit, and the working state of the compound switching switch is controlled according to the trigger signal of the trigger unit: when the compound switching switch is put into use, the thyristor is put into use firstly, then the magnetic latching relay is put into use, and then the thyristor is turned off; when the compound switching switch is switched off, the thyristor is switched on in a pilot mode, the magnetic latching relay is switched off, and the thyristor is switched off;
in the switching process of the composite switching switch, the thyristor is conducted to work, and the on-off state is maintained by the magnetic latching relay after switching is completed, so that the capacitor bank can be ensured to be disconnected from a power grid to realize an arc extinguishing function when the current is zero, and the service life of the composite switching switch is prolonged.
6. The reactive power compensation device based on the novel compound switching switch of claim 5, wherein the control processing unit adopts a microprocessor to perform information processing and control on the reactive power compensation device:
calculating the reactive power and the power factor according to the voltage signal and the compensation point current signal, comparing the power factor with the power factor reference value, and controlling the trigger unit to be put into the compound switching switch if the power factor is larger than the power factor reference value; and if the reactive power is not larger than the reference value of the power factor, comparing the reactive power with the reference value of the reactive power, and if the reactive power is larger than the reference value of the reactive power, controlling the triggering unit to be put into the compound switching switch.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911059331.1A CN110957736A (en) | 2019-11-01 | 2019-11-01 | Reactive power compensation device based on novel compound fling-cut switch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911059331.1A CN110957736A (en) | 2019-11-01 | 2019-11-01 | Reactive power compensation device based on novel compound fling-cut switch |
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| CN110957736A true CN110957736A (en) | 2020-04-03 |
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| CN201911059331.1A Pending CN110957736A (en) | 2019-11-01 | 2019-11-01 | Reactive power compensation device based on novel compound fling-cut switch |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112531729A (en) * | 2020-12-09 | 2021-03-19 | 安徽信息工程学院 | Reactive power compensation device with zero point switching and wireless communication functions |
| CN115037052A (en) * | 2022-07-09 | 2022-09-09 | 台州安耐杰电力设备有限公司 | Intelligent combination switch |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202797994U (en) * | 2012-08-25 | 2013-03-13 | 江苏东能电力科技有限公司 | Combination switch for switching of reactive power compensation capacitor |
| CN101924369B (en) * | 2010-09-07 | 2014-08-13 | 沈阳博来德滋电子科技有限公司 | Dynamic reactive power compensation method of intelligent low-pressure meter reading |
| US20170331288A1 (en) * | 2014-11-19 | 2017-11-16 | Mathieu PERCHAIS | Method for optimizing consumption of reactive energy |
| CN107666152A (en) * | 2016-07-28 | 2018-02-06 | 苏州复睿电力科技股份有限公司 | Photovoltaic power station grid entry point voltage and the out-of-limit control method of power factor |
| CN109066715A (en) * | 2018-08-31 | 2018-12-21 | 国网江苏省电力有限公司徐州供电分公司 | A kind of reactive power compensator and its compensation method based on combined multiple combination switch comprehensively control |
-
2019
- 2019-11-01 CN CN201911059331.1A patent/CN110957736A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101924369B (en) * | 2010-09-07 | 2014-08-13 | 沈阳博来德滋电子科技有限公司 | Dynamic reactive power compensation method of intelligent low-pressure meter reading |
| CN202797994U (en) * | 2012-08-25 | 2013-03-13 | 江苏东能电力科技有限公司 | Combination switch for switching of reactive power compensation capacitor |
| US20170331288A1 (en) * | 2014-11-19 | 2017-11-16 | Mathieu PERCHAIS | Method for optimizing consumption of reactive energy |
| CN107666152A (en) * | 2016-07-28 | 2018-02-06 | 苏州复睿电力科技股份有限公司 | Photovoltaic power station grid entry point voltage and the out-of-limit control method of power factor |
| CN109066715A (en) * | 2018-08-31 | 2018-12-21 | 国网江苏省电力有限公司徐州供电分公司 | A kind of reactive power compensator and its compensation method based on combined multiple combination switch comprehensively control |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112531729A (en) * | 2020-12-09 | 2021-03-19 | 安徽信息工程学院 | Reactive power compensation device with zero point switching and wireless communication functions |
| CN115037052A (en) * | 2022-07-09 | 2022-09-09 | 台州安耐杰电力设备有限公司 | Intelligent combination switch |
| CN115037052B (en) * | 2022-07-09 | 2023-08-15 | 浙江久凯电力科技有限公司 | Intelligent composite switch |
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